gecko-dev/widget/gtk/WindowSurfaceX11Image.cpp
Milan Sreckovic 5459132cb1 Bug 1296731: Add parameter to GetAlignedStride and check for overflow. r=bas
MozReview-Commit-ID: 5Ptm0bxwKdG

--HG--
extra : rebase_source : 535f2fa2447a1401b76acc0b82ce210b3c4d6dfc
2016-08-25 13:57:39 -04:00

78 lines
2.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WindowSurfaceX11Image.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Tools.h"
#include "gfxPlatform.h"
namespace mozilla {
namespace widget {
WindowSurfaceX11Image::WindowSurfaceX11Image(Display* aDisplay,
Window aWindow,
Visual* aVisual,
unsigned int aDepth)
: WindowSurfaceX11(aDisplay, aWindow, aVisual, aDepth)
, mImage(nullptr)
{
}
WindowSurfaceX11Image::~WindowSurfaceX11Image()
{
if (mImage)
XDestroyImage(mImage);
}
already_AddRefed<gfx::DrawTarget>
WindowSurfaceX11Image::Lock(const LayoutDeviceIntRegion& aRegion)
{
gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
gfx::IntSize size(bounds.XMost(), bounds.YMost());
if (!mImage || mImage->width < size.width || mImage->height < size.height) {
if (mImage)
XDestroyImage(mImage);
int stride = gfx::GetAlignedStride<16>(size.width, gfx::BytesPerPixel(mFormat));
if (stride == 0) {
return nullptr;
}
char* data = static_cast<char*>(malloc(stride * size.height));
if (!data)
return nullptr;
mImage = XCreateImage(mDisplay, mVisual, mDepth, ZPixmap, 0,
data, size.width, size.height,
8 * gfx::BytesPerPixel(mFormat), stride);
}
if (!mImage)
return nullptr;
unsigned char* data = (unsigned char*) mImage->data;
return gfxPlatform::CreateDrawTargetForData(data,
size,
mImage->bytes_per_line,
mFormat);
}
void
WindowSurfaceX11Image::CommitToDrawable(Drawable aDest, GC aGC,
const LayoutDeviceIntRegion& aInvalidRegion)
{
MOZ_ASSERT(mImage, "Attempted to commit invalid surface!");
gfx::IntRect bounds = aInvalidRegion.GetBounds().ToUnknownRect();
gfx::IntSize size(bounds.XMost(), bounds.YMost());
XPutImage(mDisplay, aDest, aGC, mImage, bounds.x, bounds.y,
bounds.x, bounds.y, size.width, size.height);
}
} // namespace widget
} // namespace mozilla